ANALYTICAL KEY TO THE ORDERS. 



CLASS I. DICOTYLEDONOUS PLANTS. (See p. 5.) 



SUBCLASS I. ANGIOSPERM2E. Pistil consisting of a closed ovary. 



Cotyledons only two. 



DIVISION I. POLYPETALOUS : the calyx and corolla both present; 



the latter of separate petals. 



A. Stamens numerous, at least more than 10, one? more than twice the sepals 



or lobes of the caly.c. 



1. Calyx entirely free and separate from the pistil or pisti/s. 



Pistils numerous but cohering over each other in a solid mass on PAGE 



an elongated receptacle. ... . MAGNOLIACE^E, 49 



Pistils numerous, separate, but concealed in a hollow receptacle. 



Leaves opposite, entire ; no stipules. . . . CALYCANTHACE^E, 167 

 Leaves alternate, with stipules. .... Rosa, in ROSACE.E, 162 

 Pistils several, immersed in hollows of the upper surface of a 



large top-shaped receptacle. . Nelumbo, in NYMPHJEACE.E, 55 

 Pistils more than one, separate, not enclosed in the receptacle. 



Stamens inserted on the calyx, distinct. .... ROSACES, 150 

 Stamens united with the base of the petals, monadelphous. MALVACEAE, 96 

 Stamens inserted on the receptacle. 



Filaments much shorter than the anther ; trees. . . ANOXACEJE, 50 

 Filaments longer than the anther. 



Flowers dioecious ; twiners with alternate leaves. MENISPERMACE/E, 51 

 Flowers perfect ; if climbers, the leaves opposite. 

 Leaves not peltate ; petals deciduous. . RANUNCULACE.E, 34 

 Leaves peltate ; petals persistent. Brasenia, in NYMPH^:ACE.E, 55 

 Pistils several-lobed, the ovaries united below the middle. IVKSEDACE/E, 75 

 Pistils several, their ovaries cohering in a ring around an axis. MALVACE.E, 96 

 Pistils strictly one as to the ovary ; the styles or stigmas may be several. 

 Leaves punctate under a lens with transparent dots. HYPERICACEJE, 92 

 Leaves not punctate with transparent dots. 



Ovary simple, 1-celled, 2-ovuled ROSACES, 150 



Ovary simple, 1-celled, with one parietal many-ovuled placenta. 

 Leaves 2 - 3-teruately compound or dissected. RANUNC PLACED, 34 

 Leaves peltate, simply lobed. Podophyllum, in BERBERIDACEA:, 52 

 Ovary compound, 1-celled, with a central placenta. PORTULACACE^E, 90 



